SilentCal comments on An Oracle standard trick - Less Wrong
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Is there a danger that if you use an Oracle with this trick repeatedly it will conclude that there's an identical Oracle whose message is being read, and start trying to acausally cooperate with this other Oracle?
The oracle does not have inaccurate beliefs, it knows everything there is to know (see http://lesswrong.com/lw/ltf/false_thermodynamic_miracles/ ).
And if there's an acausal trade issue, we can break it via: http://lesswrong.com/r/discussion/lw/luy/acaucal_trade_barriers/ .